set_property IOSTANDARD LVCMOS18 [get_ports {LED_4bits[3]}]
set_property IOSTANDARD LVCMOS18 [get_ports {LED_4bits[2]}]
set_property IOSTANDARD LVCMOS18 [get_ports {LED_4bits[1]}]
set_property IOSTANDARD LVCMOS18 [get_ports {LED_4bits[0]}]
set_property PACKAGE_PIN A7 [get_ports {LED_4bits[3]}]
set_property PACKAGE_PIN B8 [get_ports {LED_4bits[2]}]
set_property PACKAGE_PIN A6 [get_ports {LED_4bits[1]}]
set_property PACKAGE_PIN B5 [get_ports {LED_4bits[0]}]
